CVE-2021-0271: Junos OS: EX2200-C Series, EX3200 Series, EX3300 Series, EX4200 Series, EX4500 Series, EX4550 Series, EX6210 Series, EX8208 Series, EX8216 Series: Receipt of a crafted ARP packet by an adjacent attacker will cause the sfid process to core.
A Double Free vulnerability in the software forwarding interface daemon (sfid) process of Juniper Networks Junos OS allows an adjacently-connected attacker to cause a Denial of Service (DoS) by sending a crafted ARP packet to the device. Continued receipt and processing of the crafted ARP packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on EX2200-C Series, EX3200 Series, EX3300 Series, EX4200 Series, EX4500 Series, EX4550 Series, EX6210 Series, EX8208 Series, EX8216 Series. 12.3 versions prior to 12.3R12-S17; 15.1 versions prior to 15.1R7-S8. This issue only affects the listed Marvell-chipset based EX Series devices. No other products or platforms are affected.
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Frequently Asked Questions
What is the severity of CVE-2021-0271?
CVE-2021-0271 is classified with a high severity level, as it can lead to a Denial of Service (DoS).
How do I fix CVE-2021-0271?
To fix CVE-2021-0271, you should upgrade the affected Junos software to a patched version provided by Juniper Networks.
Which versions of Junos OS are affected by CVE-2021-0271?
CVE-2021-0271 affects several versions of Junos OS, including 12.3 and 15.1.
What impact does CVE-2021-0271 have on devices?
CVE-2021-0271 allows an adjacent attacker to send a crafted ARP packet that can cause a Denial of Service (DoS) on affected devices.
Is there a workaround for CVE-2021-0271?
Currently, the best protection against CVE-2021-0271 is to apply the security updates provided by Juniper Networks as there are no known workarounds.